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7Semi SHT40 Temperature & Humidity Sensor Breakout I2C Qwiic SHT40 Breakout

7Semi SHT40 Temperature & Humidity Sensor Breakout I2C Qwiic SHT40 Breakout

₹336.00Price
🔍 What this sensor is
The 7Semi SHT40 Temperature & Humidity Sensor Breakout (I2C Qwiic) is a high-precision digital environmental sensor used to measure:
  • 🌡️ Temperature
  • 💧 Humidity
👉 It’s part of Sensirion’s SHT4x series, known for excellent accuracy + ultra-low power
🧠 Core Concept (VERY IMPORTANT)
👉 This is a fully digital, factory-calibrated sensor
  • No calibration required
  • Direct I²C output
  • High resolution (16-bit)
➡️ Just connect and read values
⚙️ Key Specifications
  • Interface: I²C (Qwiic compatible)
  • Resolution: 16-bit
  • Temperature Range: -40°C to +125°C
  • Temperature Accuracy: ±0.2°C
  • Humidity Range: 0–100% RH
  • Humidity Accuracy: ±1.5% to ±1.8% RH
  • Operating Voltage: 3.3V–5V (breakout)
  • Power Consumption: extremely low (µW range)
  • Response Time: ~8 seconds
⚡ What makes Qwiic special
👉 The Qwiic connector allows:
  • 🔌 Plug-and-play connection
  • ❌ No soldering
  • 🔗 Daisy-chain multiple sensors
➡️ Makes prototyping super easy
⚙️ Working Principle
  • Uses CMOSens® technology
  • Combines:
    • Capacitive humidity sensing
    • Temperature sensing + processing
➡️ Outputs ready-to-use digital data
🔌 Pinout
(For I2C / Qwiic)
  • VCC → 3.3V / 5V
  • GND → Ground
  • SDA → Data
  • SCL → Clock
👉 Default I2C address: 0x44
🧠 Key Features
  • ✔️ High accuracy (±0.2°C, ±1.8% RH)
  • ✔️ Ultra-low power (battery-friendly)
  • ✔️ Compact & reliable
  • ✔️ Plug-and-play Qwiic system
  • ✔️ Works with Arduino, ESP32, Raspberry Pi
💡 Applications
  • 🌦️ Weather stations
  • 🏠 Smart home systems
  • 🌱 Smart agriculture
  • 📊 Data logging
  • 🌬️ HVAC systems
  • 🤖 IoT devices
⚠️ Important Notes (VERY IMPORTANT)
❗ 1. Placement matters a lot
👉 Keep away from:
  • Microcontrollers
  • Heat sources
➡️ Otherwise readings will be inaccurate
❗ 2. Needs airflow
  • Don’t seal it inside a box
  • Allow air circulation
❗ 3. Self-heating (minor)
  • Avoid very frequent readings
    👉 Use interval: 1–5 seconds
🆚 SHT40 vs SHT41
FeatureSHT40SHT41
AccuracyHigh⭐ Slightly higher
CostLowerHigher
UseMost projectsPrecision-critical
🆚 SHT40 vs DHT22
FeatureSHT40DHT22
Accuracy⭐ Very highMedium
StabilityExcellentModerate
InterfaceI2CSingle-wire
SpeedFastSlow
👍 When to use this
Use SHT40 if you want:
  • Reliable IoT sensing
  • Low power devices
  • High accuracy without complexity
  • Easy plug-and-play setup
👎 When NOT to use
Avoid if:
  • You need pressure → use BME280
  • Ultra-high precision → use SHT41
🧠 Final Understanding
👉 This sensor = “professional-grade temperature + humidity sensor (easy to use)”
👉 One of the best choices for IoT + environmental monitoring
🚀 Pro Tip (Very Useful)
👉 Best combo setup:
  • SHT40 → Temp + Humidity
  • ENS160 / SGP40 → Air quality
  • CO / HCHO sensor → gas detection
➡️ Full air monitoring system 🔥
Quantity
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